NPIMap

Individual provider Active NPI

Sandra Jean Frohling, MD

  • Internal Medicine Physician
  • Eau Claire, WI
National Provider Identifier
1164532313
Registry record updated Aug 28, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
40940 Issued in WI
Practice address
733 W Clairemont Ave
Eau Claire, WI 54701-6101
Phone
(715) 838-5025
NPI assigned
Aug 30, 2006
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 28, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 40940 WI Primary

Addresses

Primary practice location

733 W Clairemont Ave
Eau Claire, WI 54701-6101

Mailing address

200 1St St SW
Rochester, MN 55905-0001
Phone (507) 284-2511

Other identifiers 1

IdentifierTypeStateIssuer
32546700MedicaidWI

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in WI
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20100610000757 WI Practitioner - Internal Medicine 0042340408 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Washington School of Medicine, 1996
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Mayo Clinic Health System-Northwest Wisconsin Region Inc 797 clinicians

Practice addresses (Care Compare)

733 W Clairemont Ave
Eau Claire, WI 54701-6101
Phone (715) 838-5222

Hospital & facility affiliations

  • Mayo Clinic Health System in Eau Claire Home health agency, Eau Claire, WI, CCN 527138
  • Aveanna Home Health Home health agency, Eau Claire, WI, CCN 527334
  • Lakeland Home Healthcare Home health agency, Chippewa Falls, WI, CCN 527344
  • Interim Healthcare of Western Wisconsin Home health agency, Hudson, WI, CCN 527291
  • Compassus Home Health Home health agency, Marshfield, WI, CCN 527189
  • St Croix Hospice Eau Claire Hospice, Eau Claire, WI, CCN 521599
  • Mayo Clinic Health System Eau Claire Hospital Hospital, Eau Claire, WI, CCN 520070
  • Mayo Clinic Health System Chippewa Valley Hospital, Bloomer, WI, CCN 521314
  • Mayo Clinic Health System-Northland Hospital, Barron, WI, CCN 521315
  • Mayo Clinic Health System-Red Cedar Inc Hospital, Menomonie, WI, CCN 521340
  • Marshfield Medical Center - Eau Claire Hospital, Eau Claire, WI, CCN 520210

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of skin lesions1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
40940WIMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Marshfield Clinic Inc CurrentSince Aug 1, 1999 Accepting new patients
MCHS Hospitals Inc CurrentSince Mar 10, 2019 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince May 23, 2024 Accepting new patients
Lakeview Medical Center Inc of Rice Lake CurrentSince Oct 30, 2018 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. CurrentSince May 23, 2024 Accepting new patients
MCHS Hospitals Inc Internal Medicine CurrentSince Mar 10, 2019 Accepting new patients
Mayo Clinic Health System-Northwest Wisconsin Region, Inc. Past Accepting new patients

Locations

200 1st St SW
Rochester, MN 55905
Phone (507) 266-4850

1711 York St
Bloomer, WI 54724
Phone (715) 568-6200

2655 County Highway I
Chippewa Fls, WI 54729
Phone (715) 723-8827

2116 Craig Rd
Eau Claire, WI 54701
Phone (715) 858-4500

3501 Golf Rd
Eau Claire, WI 54701
Phone (715) 858-4200

1000 Starr Ave
Eau Claire, WI 54703
Phone (715) 858-4850

733 W Clairemont Ave
Eau Claire, WI 54701
Phone (715) 838-3806

1000 N Oak Ave
Marshfield, WI 54449
Phone (715) 387-5111

1700 W Stout St
Rice Lake, WI 54868
Phone (715) 236-6133

Interoperability endpoints

  • Direct secure messaging: sandra.frohling@marshfieldclinichealthsystem.cernerdirect.com
  • Direct secure messaging: sfrohling1307258@ehrdirect.mayoclinicmsg.org

Organizations & group practices 25

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

View all 25

Hospital & facility affiliations 11

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1156896000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787875200000",
    "number": "1164532313",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 1ST ST SW",
            "city": "ROCHESTER",
            "state": "MN",
            "postal_code": "559050001",
            "telephone_number": "507-284-2511"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "733 W CLAIREMONT AVE",
            "city": "EAU CLAIRE",
            "state": "WI",
            "postal_code": "547016101",
            "telephone_number": "715-838-5025"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FROHLING",
        "first_name": "SANDRA",
        "middle_name": "JEAN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-08-30",
        "last_updated": "2026-08-28",
        "certification_date": "2026-08-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "WI",
            "license": "40940",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "32546700",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Eau Claire, WI

Sources for this page

Verify at the official NPI Registry.